Author Topic: Null Image Error at dense cloud initialization  (Read 2103 times)


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Null Image Error at dense cloud initialization
« on: November 24, 2020, 12:56:58 PM »

I've been trying to build some larger models (ranging from 300-2000 images). Increasingly, as I get to the dense cloud stage, processing stops with this error (see attached .txt files):

2020-11-24 20:22:36 filtering 19 depth maps...
2020-11-24 20:22:36 using 206 depth maps including neighbors (4.46845 GB)
2020-11-24 20:22:36 preloading data... 2020-11-24 20:22:40 Error: Null image

This error seems to be intermittent, even when using the same batch file, so I have been unable to isolate what causes it.  Is this a known error and is there a solution?


Alexey Pasumansky

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Re: Null Image Error at dense cloud initialization
« Reply #1 on: November 24, 2020, 01:29:03 PM »
Hello Neil,

Can you please provide the following information regrading your system: OS version, CPU model. GPU model, GPU driver version, number of RAM modules, their capacity and frequency, motherboard model.

This error should not appear in common cases, as it means that some depth map cannot be unpacked and read. I would rather say that the problem is related to the RAM issues, so it is recommended to run multi-threaded Memtest86 checks for considerable time period. Also if the CPU or RAM is overclocked, please return them to the original state, it may be also reasonable even to lower the RAM frequency, for example to 2000 MHz and check if it solves the problem.
Best regards,
Alexey Pasumansky,
Agisoft LLC